Abstract
Abstract Using data from population-based cohorts of older adults 65+ from six countries across three continents (N=6472), we aimed to (1) describe and (2) identify predictors of usual and rapid gait speed from studies participating in the Cohort Studies of Memory in an International Consortium (COSMIC) collaboration. We investigated whether clinical (BMI, hypertension, stroke, APOE status), psychological (cognition, mood, general health) and behavioral factors (smoking, drinking, physical activity) predicted gait speed similarly across cohorts; we used regression models controlling for demographics. Unadjusted usual gait speed ranged from 0.52-1.09 m/s and rapid gait speed ranged from 1.20-1.68 m/s. Lower BMI and better cognitive function consistently predicted faster usual and rapid gait speed in all cohorts. These patterns were not attenuated by demographics. Other psychological and behavioral factors were less consistently associated with gait. Taken together, gait speed is variable across ethnogeographic regions, but the influence of cognitive on gait is remarkably consistent.
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